133749020 has 12 divisors (see below), whose sum is σ = 280872984. Its totient is φ = 53499600.

The previous prime is 133749017. The next prime is 133749061. The reversal of 133749020 is 20947331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3343706 + ... + 3343745.

It is an arithmetic number, because the mean of its divisors is an integer number (23406082).

Almost surely, 2^133749020 is an apocalyptic number.

133749020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133749020 is an abundant number, since it is smaller than the sum of its proper divisors (147123964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133749020 is a wasteful number, since it uses less digits than its factorization.

133749020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6687460 (or 6687458 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 133749020 is about 11564.9911370481. The cubic root of 133749020 is about 511.4033118439.

The spelling of 133749020 in words is "one hundred thirty-three million, seven hundred forty-nine thousand, twenty".